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When I rebuild my Metz 45 CT4, they were nickel cadmium batteries in AA size. Buy AA size Nickel Metal Hydride batteries in the highest milliamp hour you can buy. Sanyo Eneloop are the best on the market. You need the type with solder tags on them. They have to be arrange in a certain way. Diagram here
I have a lot of old 45-40 Series Metz 45 NiCd battery packs, that I will eventually rebuild with new NiCd batteries. I got them from Photographic Trader magazine and from ebay. I've heard that NiCd cells are going out of production, in favour of NiMH cells. I've found it's easier to put NiCd or NiMH cells in the alkaline battery holder, the flash recycle time is only slightly longer. I charge them separately out of the holder, or in the holder with a connector I made. NiMH cells need a suitable charger, with peak detection, as NiMH cells don't like being overcharged.
Metz 45-40 consist of 6 nos of NiCd - AA size batteries connected in series.
These battery packs can be rechanged by resoldering new set of AA size rechargable Nicd battries.
Care should be taken not to short circuit the cells when disassembling and assembling the cells.
Keep a note (sketch) of the connections of the cells, specially the longer connecting metal strip and the polarities of cells.
re-solder the new set of AA size NiCd Batteries.
If the old wires were corroded, use new wires'
If the connecting terminals also corroded' clean it.
If it is severely corroded, get it plated prior to fixing for better performance..
There is an charging indicating lamp which also control the charging current of the batteries.
check its connections and solder it if required.
I wish you got the answer for your problem.
H.D. Shirantha.
Although you can still get lead acid batteries from Sonnenschein (the original oem manufacturer) for the Metz CT60 units, a better choice are the Lithium ferrite phosphate or Lithium ion batteries, now available on ebay. For example sales8phd on ebay sells a drop in replacement 6 or 7Ah battery with a charger for ~$75. In general these batteries produce more flashes per charge than the lead acid oem batteries,particularly when shooting a lot of flashes in rapid sucession.
Check the polarity of the batteries. With the batteries removed you will be able to see small + and - alongside each of the six connectors. Make sure the + of the battery connects with the + connector. Similarly check the - connections. With the batteries inserted (but without the plastic cap being fitted) you should see the ends of the batteries. Three positive ends (all in a row) and three negative ends. If one, or more, has been inserted with the polarity reversed it will stop the flash from working. It can also cause the handle to overheat.
I haven't seen a 202, but if it's the same as the later 45 series, then looking into the bottom of the flash, the top pin at the round end is positive, the left one half way down is the negative for 7.2V NiCDs and the bottom right one, lowest down in the square corner, is the negative for 9V alkaline batteries. I've used NiCds and NIMH batteries with no problems,connected to the alkaline pins, it's just a tapping on the power supply transformer to compensate for the NiCDs having a lower voltage. There's also a 0.2 ohm resistor inside some of the Metz 45 models, in series with the NiCd negative line, probably to limit the initial current. I've had no problems at all over 24 years, with using NICds or NIMH on the alkaline connections, in an alkaline battery holder.
I had that same problem also, but mines was temporarly. Ik think the condensor inside the Metz has to regeneratie (recover) itself by using with a full charged fresh batteries. The high freq. sound is normal. (although not to loud) after a 5 MINUTES the orange bulb should light up. How more u used how better the start-up time. My old Metz start-up time was around 40 sec. and now ot is within 7 sec.
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